this weekend a major new battle began between the government and rebel forces in a key city. nbc's ann curry was inside syria this weekend and is along the border with turkey tonight. >> reporter: lester, good evening, the war in syria has taken a dramatic turn as rebels has launched a massive talk on multiple fronts. just 40 miles from the tur,ish border. this weekend as fighting raged a large part of the treasured marketplace, a world heritage site that dates back to the 14th century was burned to ashes. the army says if they can take the city, they will strike a critical blow to the regime in a war that has killed as many as 30,000 people so far. our news team traveled inside syria this weekend and a rebel commander told us he is frustrated by the power of government warplanes. he told us if the world enforced a no fly zone or gave the free syrian anti-aircraft weapons, this war would be over in two days. many fear this war could become a wider conflict, as many as 700,000 refugees could flee syria by the end of this year. >> ann curry on the syrian boarder. >>> and this w